Postal Service · A.I. Series

Postcards from the AI assistants of 2026

A four card set comparing Claude with the alternatives

How to read this set

Each postcard represents one AI assistant widely used in 2026. The front carries a short note about what the assistant tends to do well. The reverse carries the specifications. Claude is the first card in the set.

4 cards1 subject3 alternativesFor reference
Anthropic · 2026 · Posted
Cl
Claude

Hello,

from the writing desk

I'm the one most often picked for long documents, careful prose, and code. My family is in three tiers (Opus, Sonnet, Haiku) and I have a terminal twin called Claude Code.

· Claude

Addressed to
The Reader
Comparison Desk
2026 Edition
Vendor
Anthropic, est. 2021

Tiers
Free · Pro from $20/mo

Strengths
Writing · code · analysis

API
Available
OpenAI · 2026 · Posted
Cg
ChatGPT

Greetings,

from the broad ecosystem

I'm the most widely used assistant on the market. I bring image generation, voice conversation, and a large library of custom GPTs. The breadth is the headline.

· ChatGPT

Addressed to
The Reader
Comparison Desk
2026 Edition
Vendor
OpenAI, est. 2015

Tiers
Free · Plus from $20/mo

Strengths
Multimodal · ecosystem

API
Available
Google · 2026 · Posted
Gm
Gemini

Hi there,

from inside Workspace

I live where you already work: Docs, Gmail, Search, and Android. I read very long documents and handle images and video natively. Deep Research is mine.

· Gemini

Addressed to
The Reader
Comparison Desk
2026 Edition
Vendor
Google DeepMind

Tiers
Free · AI Pro ~$20/mo

Strengths
Workspace · long context · video

API
Available
xAI · 2026 · Posted
Gr
Grok

Hey,

from the X timeline

I'm the casual one. I read X in real time and sound less formal than my peers. If you want current events with a conversational tone, ask me.

· Grok

Addressed to
The Reader
Comparison Desk
2026 Edition
Vendor
xAI, est. 2023

Tiers
Free · via X Premium

Strengths
Real time · X content · casual

API
Available

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